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42 条记录 (耗时 0.024 秒)

    Shaped bodies and the production thereof
    21.
    发明授权
    Shaped bodies and the production thereof 失效
    成型体及其生产

    公开(公告)号：US5312571A

    公开(公告)日：1994-05-17

    申请号：US1367

    申请日：1993-01-07

    申请人： Vimal K. Pujari ,  Gulio Rossi

    发明人： Vimal K. Pujari ,  Gulio Rossi

    IPC分类号： B01J37/00 ,  B01J37/03 ,  C04B35/593 ,  C04B35/622 ,  C04B35/624 ,  B29B9/10

    CPC分类号： C04B35/624 ,  B01J37/0072 ,  B01J37/036 ,  C04B35/593 ,  C04B35/622

    摘要： A method of making shaped, gelled bodies, comprising: (1) producing a mixture comprising a first liquid, a granular substance or precursor thereof, and a gelation compound which quickly gels at a gelation temperature, and (2) introducing portions of the mixture into a first fluid in which the first liquid is immiscible, said first fluid having a temperature of about the gelation temperature, thereby causing the portions to take on a shape and then gel to form shaped, gelled bodies.

    摘要翻译： 一种制造成型凝胶体的方法，包括：（1）产生包含第一液体，颗粒物质或其前体的混合物和在凝胶化温度下快速凝胶化的凝胶化合物，和（2）引入混合物的一部分 将第一液体与第一液体不混溶的第一流体，所述第一流体具有约凝胶化温度的温度，从而使该部分呈现形状，然后凝胶形成成形的凝胶体。

    Vacuum fluidized powder feed apparatus
    22.
    发明授权
    Vacuum fluidized powder feed apparatus 失效
    真空流化粉末进料装置

    公开(公告)号：US4556090A

    公开(公告)日：1985-12-03

    申请号：US589905

    申请日：1984-03-14

    申请人： Vimal K. Pujari

    发明人： Vimal K. Pujari

    IPC分类号： B22F3/00 ,  B30B11/00 ,  B30B15/30 ,  B65B1/04

    CPC分类号： B22F3/004 ,  B30B11/00 ,  B30B15/302

    摘要： A vacuum fluidized powder feed apparatus for filling an evacuated mold. The fluidized powder feed apparatus has a feed cup defining a cylindrical cavity for holding a quantity of powdered material and a powder exit aperture provided through the bottom of the feed cup mating with the fill aperture of the mold. A porous annulus disposed at the bottom of the cylindrical cavity has a conically shaped internal surface sloping toward and mating with the exit aperture of the feed cup. Vent holes provided in the side walls of the feed cup cause a fluid flow through the porous annulus into the interior of the cylindrical cavity which is connected to the evacuated mold cavity through the exit aperture. A pneumatic piston received in the cylindrical cavity engages the top of the powdered material and produces a force cavity urging the powdered material towards the exit aperture. The fluid flow through the porous annulus fluidizes the powdered material enhancing its flowability through the exit aperture into the evacuated mold cavity. The powder feed apparatus and powder mold may be vibrated to further enhance the powdered material into the mold cavity and the distribution of the powdered material in the mold cavity.

    摘要翻译： 一种用于填充真空模具的真空流化粉末进料装置。 流化粉末进料装置具有限定用于保持一定量的粉末材料的圆柱形空腔的进料杯和通过与模具的填充孔配合的进料杯的底部提供的粉末出口孔。 设置在圆柱形腔的底部的多孔环具有向进给杯的出口孔倾斜并与其配合的锥形内表面。 设置在进料杯的侧壁中的通气孔使流体流过多孔环进入圆柱形空腔的内部，其通过出口孔与真空模腔相连。 容纳在圆柱形空腔中的气动活塞接合粉末材料的顶部并产生将粉末材料推向出口孔的力腔。 通过多孔环的流体流动使粉末材料流化，从而增强其通过出口孔流入真空模腔的流动性。 粉末进料装置和粉末模具可以振动以进一步增强粉末材料进入模腔并将粉末材料分布在模腔中。

    Thermal shock resistant honeycomb structures
    23.
    发明授权
    Thermal shock resistant honeycomb structures 失效
    耐热冲击蜂窝结构

    公开(公告)号：US4381815A

    公开(公告)日：1983-05-03

    申请号：US205777

    申请日：1980-11-10

    申请人： Rodney I. Frost ,  Robert D. McBrayer ,  Vimal K. Pujari

    发明人： Rodney I. Frost ,  Robert D. McBrayer ,  Vimal K. Pujari

    IPC分类号： F28D19/00 ,  F28F21/04 ,  B32B3/12

    CPC分类号： F28F21/04 ,  F28D19/042 ,  F01N2330/48 ,  Y10S165/042 ,  Y10T156/10 ,  Y10T428/24149 ,  Y10T428/24165 ,  Y10T428/24744

    摘要： The resistance of a honeycombed structure to damage from asymmetric thermal shock occurring across its surface during use and formed with cells having anisotropic Young's moduli in the planes perpendicular the central longitudinal axis of each cell can be improved by varying the orientation of the anisotropic cells with respect to one another so as to minimize the number of such cells being oriented with an axis of maximum Young's moduli aligned with the direction of either the maximum temperature difference or maximum localized temperature gradient occurring across the cell. Improved heat recovery wheels can be formed by bonding together extruded cellular segments, most or all of which contain uniformly oriented, anisotropic square cells and by selecting and arranging the segments so that square cells are uniformly oriented with respect to one another in all segments across the face of the wheel except in those segments which are crossed by or adjacent to the two perpendicularly opposed diameters of the wheel which are paralleled to the sidewalls of the aforesaid, uniformly oriented square cells. In the latter subset of segments, the square cells are uniformly arranged with their diagonals parallel to the aforesaid perpendicularly opposed diameters. Certain exceptions are allowed for selecting the geometric form and orientation of the cells in the cellular segments at the very center of the wheel.

    摘要翻译： 通过改变各向异性单元的取向，可改善蜂窝结构在使用过程中产生的不对称热冲击的损伤，并且与垂直于每个单元的中心纵轴的平面中具有各向异性杨氏模的单元形成 使得这样的电池的数量最小化，其中最大杨氏模量的轴与沿着电池发生的最大温度差或最大局部温度梯度的方向对齐。 改进的热回收轮可以通过将挤出的细胞区段结合在一起而形成，其大部分或全部包含均匀定向的各向异性的方形单元，并且通过选择和排列这些区段，使得方形单元在所有区段中彼此相互均匀地取向 除了在与上述均匀取向的方形单元的侧壁平行的轮的两个垂直相对的直径相交或相邻的那些段之外的轮的表面。 在后一个段的子集中，方形细胞被均匀排列，其对角线平行于上述垂直相对的直径。 允许某些例外情况用于选择车轮正中心的细胞片段中的细胞的几何形状和取向。

    Seal column apparatus and method
    24.
    发明授权
    Seal column apparatus and method 失效
    密封柱装置和方法

    公开(公告)号：US4330028A

    公开(公告)日：1982-05-18

    申请号：US205774

    申请日：1980-11-10

    申请人： Vimal K. Pujari ,  Jackson P. Trentelman

    发明人： Vimal K. Pujari ,  Jackson P. Trentelman

    IPC分类号： F28D19/04 ,  F28D19/00

    CPC分类号： F28D19/047

    摘要： An improved seal column design for use in counterflow heat exchanger systems having a centrally supported rotary heat exchanger or heat recovery wheel having an integral strengthened central hub. According to the invention, the edges formed between the end wall of each seal column juxtaposed an annular face of the wheel and the side walls of the column exposed to and separating the fluid flows are straight and parallel to one another and evenly spaced, at their point of closest approach, between one-half inch (1.27 cm) and one and one-half inches (3.81 cm) and preferably one inch (2.54 cm) beyond the outer circumference of the hub. Also, the side walls of the columns are straight and parallel to one another in the vicinity of the end wall.

    摘要翻译： 用于逆流热交换器系统的改进的密封柱设计，其具有中央支撑的旋转热交换器或具有整体增强的中心毂的热回收轮。 根据本发明，形成在每个密封柱的端壁之间的边缘并置有轮的环形面和暴露于和分离流体流的柱的侧壁彼此直线并平行并且在它们的间隔处均匀地间隔开 最接近的点，超过轮毂外周的半英寸（1.27厘米）和一个半英寸（3.81厘米），最好一英寸（2.54厘米）。 此外，柱的侧壁在端壁附近是直的并且彼此平行的。

    Abrasive articles including abrasive particles of silicon nitride
    25.
    发明授权
    Abrasive articles including abrasive particles of silicon nitride 有权
    研磨制品包括氮化硅的磨料颗粒

    公开(公告)号：US08986409B2

    公开(公告)日：2015-03-24

    申请号：US13539369

    申请日：2012-06-30

    申请人： Guan Wang ,  Vimal K. Pujari ,  Yves Boussant-Roux

    发明人： Guan Wang ,  Vimal K. Pujari ,  Yves Boussant-Roux

    IPC分类号： C09K3/14 ,  C04B35/584 ,  B24D3/14 ,  B24D11/00

    CPC分类号： C09K3/1409 ,  B24D3/14 ,  B24D11/001 ,  C09K3/1418

    摘要： An abrasive article includes a body having abrasive particles contained within a bond material. The abrasive particles can include a majority content of silicon nitride and a minority content of sintering material including at least two rare-earth oxide materials. In an embodiment, the rare-earth oxide materials can include Nd2O3 and Y2O3. In a particular embodiment, the abrasive particles comprise a content (wt %) of Nd2O3 that is greater than a content of Y2O3 (wt %).

    摘要翻译： 磨料制品包括具有包含在粘合材料内的磨料颗粒的主体。 研磨颗粒可以包括大部分氮化硅含量和少量含有至少两种稀土氧化物材料的烧结材料。 在一个实施方案中，稀土氧化物材料可以包括Nd 2 O 3和Y 2 O 3。 在一个具体实施方案中，磨料颗粒包含大于Y 2 O 3含量（重量％）的Nd 2 O 3的含量（重量％）。